EP0695326B1 - Heat-sealable polystyrene-based blends - Google Patents
Heat-sealable polystyrene-based blends Download PDFInfo
- Publication number
- EP0695326B1 EP0695326B1 EP94913926A EP94913926A EP0695326B1 EP 0695326 B1 EP0695326 B1 EP 0695326B1 EP 94913926 A EP94913926 A EP 94913926A EP 94913926 A EP94913926 A EP 94913926A EP 0695326 B1 EP0695326 B1 EP 0695326B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- percent
- composition
- styrene
- rubber
- layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B25/00—Layered products comprising a layer of natural or synthetic rubber
- B32B25/14—Layered products comprising a layer of natural or synthetic rubber comprising synthetic rubber copolymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
- C08L25/02—Homopolymers or copolymers of hydrocarbons
- C08L25/04—Homopolymers or copolymers of styrene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L53/02—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers of vinyl-aromatic monomers and conjugated dienes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/31—Heat sealable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2319/00—Synthetic rubber
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2439/00—Containers; Receptacles
- B32B2439/70—Food packaging
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
- Y10T428/2495—Thickness [relative or absolute]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31855—Of addition polymer from unsaturated monomers
- Y10T428/31909—Next to second addition polymer from unsaturated monomers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31855—Of addition polymer from unsaturated monomers
- Y10T428/31909—Next to second addition polymer from unsaturated monomers
- Y10T428/31913—Monoolefin polymer
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31855—Of addition polymer from unsaturated monomers
- Y10T428/31909—Next to second addition polymer from unsaturated monomers
- Y10T428/31924—Including polyene monomers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31855—Of addition polymer from unsaturated monomers
- Y10T428/31938—Polymer of monoethylenically unsaturated hydrocarbon
Abstract
Description
Advantageously, no glue layer is required to join the support layer to the heat-sealable layer. Examples of materials suitable for use as the support include thermoplastics such as styrenic resins, such as polystyrene and high impact polystyrene, styrene-butadiene block copolymers, and mixtures of these materials. The material of the support layer should be compatible with the sealing layer composition and should have good physical properties. In general, in the case where the article of the invention is a thin sheet, or foil, which is to be used to make lids for containers, such as dairy food containers, the composition of the support layer depends upon the physical properties desired in the final lidding foil. The seal layer composition can be included in t the support layer to provide for sufficient compatibility of the sealing layer to the support layer. Compatibility is important during peeling of the lid from the container. The amount of seal layer composition in the support layer preferably is at least about 30 weight percent, and more preferably is from 32 to 40 percent.
Compositions | ||||
Composition | Styrenic Resin | EAA | SBS | Pigment |
1 (m) | 70 | 10 | 20 | - |
1 (s) | 50 | 10 | 40 | - |
2 (m) | 80 | 20 | 6.67 | |
2 (s) | 50 | 10 | 40 | |
3 (m) | 80 | 20 | 6.67 | |
3 (s) | 20 | 40 | 40 |
Claims (8)
- A composition comprising: from 20 to 60 percent by weight of an optionally rubber-reinforced styrenic resin; from 30 to 70 percent of a styrene-butadiene-styrene block copolymer; and from 4 to 40 percent of a copolymer of ethylene and acrylic acid wherein the styrene-butadiene-styrene block copolymer comprises from 10 to 50 percent styrene units, and wherein the copolymer of ethylene and acrylic acid comprises from 6 to 12 percent acrylic acid.
- The composition of Claim 1 comprising from 45 to 55 percent of the styrenic resin.
- The composition of Claim 1 wherein the styrenic resin is rubber-reinforced.
- The composition of Claim 1 wherein the styrenic resin is not rubber-reinforced.
- The composition of Claim 1 wherein from 33 to 55 percent of a styrene-butadiene-styrene block copolymer is employed.
- The composition of Claim 1 comprising from 5 to 15 percent of the copolymer of ethylene and acrylic acid.
- A heat-sealable composite, comprising a heat-sealable layer comprising the composition of Claim 1, and a support layer of an optionally rubber-reinforced styrenic resin.
- A composition comprising: from 45 to 55 percent by weight of a rubber-reinforced styrenic resin; from 33 to 55 percent by weight of a styrene-butadiene-styrene block copolymer having from 10 to 50 percent styrene units; and from 5 to 15 percent by weight of an ethylene acrylic acid copolymer, comprising from 6 to 12 percent acrylic acid.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US4993493A | 1993-04-20 | 1993-04-20 | |
US49934 | 1993-04-20 | ||
PCT/US1994/003016 WO1994024205A1 (en) | 1993-04-20 | 1994-03-18 | Heat-sealable polystyrene-based blends |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0695326A1 EP0695326A1 (en) | 1996-02-07 |
EP0695326B1 true EP0695326B1 (en) | 1998-10-14 |
Family
ID=21962535
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94913926A Expired - Lifetime EP0695326B1 (en) | 1993-04-20 | 1994-03-18 | Heat-sealable polystyrene-based blends |
Country Status (14)
Country | Link |
---|---|
US (1) | US5474855A (en) |
EP (1) | EP0695326B1 (en) |
JP (1) | JPH08509011A (en) |
AT (1) | ATE172222T1 (en) |
AU (1) | AU674577B2 (en) |
BR (1) | BR9405964A (en) |
CA (1) | CA2159347A1 (en) |
CO (1) | CO4290516A1 (en) |
DE (1) | DE69413959T2 (en) |
DK (1) | DK0695326T3 (en) |
ES (1) | ES2122272T3 (en) |
FI (1) | FI954987A0 (en) |
NO (1) | NO954187L (en) |
WO (1) | WO1994024205A1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT397386B (en) * | 1992-02-24 | 1994-03-25 | Klepsch Liliana | DETACHABLE HOT SEALABLE FILM |
ES2124874T3 (en) * | 1993-02-03 | 1999-02-16 | Exxon Chemical Patents Inc | THERMOPLASTIC FILMS ELASTOMERICAS DE COPOLIMEROS. |
BE1010747A3 (en) * | 1996-11-13 | 1999-01-05 | Sidaplax V O F | Synthetic films that can be thermally welded |
JPH11227123A (en) * | 1998-02-19 | 1999-08-24 | Dainippon Ink & Chem Inc | Biaxially oriented styrene resin laminated sheet and its manufacture |
AU1633800A (en) * | 1999-01-21 | 2000-08-07 | Dow Chemical Company, The | Coextruded sheets used in heat sealed thermoformed articles |
US7358282B2 (en) * | 2003-12-05 | 2008-04-15 | Kimberly-Clark Worldwide, Inc. | Low-density, open-cell, soft, flexible, thermoplastic, absorbent foam and method of making foam |
US7892391B2 (en) | 2004-01-29 | 2011-02-22 | E. I. Du Pont De Nemours And Company | Compositions of ethylene/vinyl acetate copolymers for heat-sealable easy opening packaging |
WO2014111292A1 (en) | 2013-01-18 | 2014-07-24 | Basf Se | Acrylic dispersion-based coating compositions |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3315872A (en) * | 1964-11-02 | 1967-04-25 | Dow Chemical Co | Hermetically sealed plastic containers |
FR2112267B1 (en) * | 1970-10-07 | 1975-04-18 | Basf Ag | |
JPS5920557B2 (en) * | 1978-06-29 | 1984-05-14 | 電気化学工業株式会社 | packaging |
US4275179A (en) * | 1979-09-24 | 1981-06-23 | Mobil Oil Corporation | Poly(p-methylstyrene) polyblend |
US4539371A (en) * | 1983-12-30 | 1985-09-03 | Mobil Oil Corporation | High impact poly(p-methylstyrene) polymers |
JPH0647260B2 (en) * | 1985-07-30 | 1994-06-22 | 三菱油化株式会社 | Composite molded body |
DE3531036A1 (en) * | 1985-08-30 | 1987-03-12 | Basf Ag | SEALABLE THERMOPLASTIC MOLDING |
US4647509A (en) * | 1985-10-07 | 1987-03-03 | The Dow Chemical Company | Thermoformable multilayer barrier structures |
DE4123672A1 (en) * | 1991-07-17 | 1993-01-21 | Basf Ag | SEALABLE, PEELABLE PLASTIC FILM |
-
1994
- 1994-03-18 AT AT94913926T patent/ATE172222T1/en not_active IP Right Cessation
- 1994-03-18 DK DK94913926T patent/DK0695326T3/en active
- 1994-03-18 CA CA002159347A patent/CA2159347A1/en not_active Abandoned
- 1994-03-18 AU AU65893/94A patent/AU674577B2/en not_active Ceased
- 1994-03-18 ES ES94913926T patent/ES2122272T3/en not_active Expired - Lifetime
- 1994-03-18 DE DE69413959T patent/DE69413959T2/en not_active Expired - Fee Related
- 1994-03-18 BR BR9405964A patent/BR9405964A/en not_active Application Discontinuation
- 1994-03-18 EP EP94913926A patent/EP0695326B1/en not_active Expired - Lifetime
- 1994-03-18 WO PCT/US1994/003016 patent/WO1994024205A1/en active IP Right Grant
- 1994-03-18 JP JP6523194A patent/JPH08509011A/en active Pending
- 1994-04-18 CO CO94015604A patent/CO4290516A1/en unknown
- 1994-08-03 US US08/285,615 patent/US5474855A/en not_active Expired - Fee Related
-
1995
- 1995-10-19 FI FI954987A patent/FI954987A0/en unknown
- 1995-10-19 NO NO954187A patent/NO954187L/en unknown
Also Published As
Publication number | Publication date |
---|---|
WO1994024205A1 (en) | 1994-10-27 |
ATE172222T1 (en) | 1998-10-15 |
ES2122272T3 (en) | 1998-12-16 |
DE69413959D1 (en) | 1998-11-19 |
FI954987A (en) | 1995-10-19 |
JPH08509011A (en) | 1996-09-24 |
DK0695326T3 (en) | 1999-06-23 |
EP0695326A1 (en) | 1996-02-07 |
BR9405964A (en) | 1996-01-30 |
US5474855A (en) | 1995-12-12 |
DE69413959T2 (en) | 1999-05-12 |
CO4290516A1 (en) | 1996-04-17 |
AU6589394A (en) | 1994-11-08 |
NO954187D0 (en) | 1995-10-19 |
NO954187L (en) | 1995-10-19 |
FI954987A0 (en) | 1995-10-19 |
AU674577B2 (en) | 1997-01-02 |
CA2159347A1 (en) | 1994-10-27 |
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